chore(main): release ichiyo_ai 1.20.1

[higuchi-ichiyo[bot]]

:robot: I have created a release beep boop

1.20.1 (2024-01-02)

Bug Fixes

• serde_json の "expected a borrowd string" のエラー (#179) (5cc69ce)

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[higuchi-ichiyo[bot]]

:robot: Release is at https://github.com/approvers/ichiyoAI/releases/tag/ichiyo_ai-v1.20.1 :sunflower: